ACloud Guru Certified Cloud Practitioner Practice Exam

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What is the lowest cost solution for storing database backups that need to be retrieved within 6 hours?

Amazon S3
Amazon Glacier
Amazon S3 Standard-IA
Amazon EFS

The correct answer is: Amazon Glacier

The most suitable option for storing database backups that need to be retrieved within 6 hours is Amazon S3. While Amazon Glacier is specifically designed for low-cost storage with longer retrieval times, it is optimized for archival storage where data retrieval may take hours to days, which does not fit the requirement of needing access within 6 hours. Amazon S3 offers various storage classes, including Standard and Intelligent-Tiering, designed for frequent access, while S3 Standard-IA (Infrequent Access) provides lower-cost storage for data that is not accessed frequently but still needs to be retrieved quickly when necessary. Amazon EFS (Elastic File System) is generally used for file storage and may not be the most cost-effective solution for storing database backups compared to S3 options, particularly for the needs stated in the question. Thus, for quicker retrieval times and cost-effective storage tailored to the described requirements, Amazon S3 serves as the best solution.